| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | to a [adj] period [prep] [adj] | 13 |
|
| 2 | to a [adj] period of [adj] | 12 |
|
| 3 | to a [adj] period [prep] [adj] | 11 |
|
| 4 | to a [adj] period [prep] [adj] | 11 |
|
